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Unity jAllegro - A lousy javascript port of a game programming library

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jAllegro

A lousy javascript port of a game programming library

 
 
About jAllegro
 
jAllegro is a minimal javascript port of a really popular game programming library called Allegro 4 from the first decade of our century. Allegro 4 is a simple game programming library that abstracts a set of functions in C programming language to the developer allowing for simple and rapid creation of video games, without the need to program entity systems, classes and so on. Allegro 5 is the current Allegro version, but it varies greatly in how the API works, thus alienating many hardcore Allegro users. This library aims to provide a simple wrapper for a subset of canvas operations making it look like good old Allegro.
 
 
jAllegro background
 
I wanted to create something that will be easy to use and different from everything that's already out there. Since Allegro and SDL, there haven't been many non-object-oriented game libraries around, especially with the rise of AS3 and Unity. jAllegro is something else, I would like to to be available to both hardcore Allegro freaks and total newcomers who have never made a game before! I don't think this is going to become the new industry standard, but I hope it will allow newcomers to try something simple, old Allegro folks to get a bit nostalgic and maybe move on to browser development, and for game jammers to have something bloat-free that can get the job done, fast and ugly, lean and mean.
 
 
Where to get jAllegro
 
 
jAllegro Hello World!
 
Here's a source code of jAllegro "Hello World!" example to give you an idea as to how it works.
 
function main()
{
    allegro_init();
    set_gfx_mode("canvas_id", 640, 480);
    clear_to_color(canvas,makecol(255,255,255));
    textout_centre(canvas,font,"Hello World!",SCREEN_W/2,SCREEN_H/2,24,makecol(0,0,0));
    return 0;
}
END_OF_MAIN(); 
 
Here's a output pixture of the above code!
 
exhello.jpg
 
jAllegro example game
 
Want something more sophisticated? Here's the jAllegro example game code. It's under 50 lines of code!
 
var man,apple,bg;
var munch;
var apple_x=200,apple_y=200;
var player_x=100,player_y=100;
var score = 0;
 
function draw()
{
    draw_sprite(canvas,bg,0,0);
    draw_sprite(canvas,man,player_x,player_y);
    draw_sprite(canvas,apple,apple_x,apple_y);
    textout(canvas,font,"Score: " + score,10,20,24,makecol(255,255,255));
}
 
function update()
{
    if (key[KEY_UP]) player_y-=4;
    if (key[KEY_DOWN]) player_y+=4;
    if (key[KEY_LEFT]) player_x-=4;
    if (key[KEY_RIGHT]) player_x+=4;
    if (distance(player_x,player_y,apple_x,apple_y)<20)
    {
        play_sample(munch);
        apple_x = rand()%(SCREEN_W-32);
        apple_y = rand()%(SCREEN_H-32);
        score++;
        log("Apple eaten!");
    }
}
 
function main()
{
    enable_debug('debug');
    allegro_init_all("canvas_id", 640, 480);
    man = load_bmp("data/man.png");
    apple = load_bmp("data/apple.png");
    bg = load_bmp("data/grass.jpg");
    munch = load_sample("data/munch.mp3");
 
    ready(function(){
        loop(function(){
            update();
            draw();
        },BPS_TO_TIMER(60));
    });
    return 0;
}
END_OF_MAIN();
 
And here's a screenshot of the game:
 
exgame.jpg
 
Use jAllegro
 
Planing to use jAllegro? Have any troubles? Found a bug? Wanna say hi?
 
 
Bonus!
 

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Congratulations for your release and for the good quality of the documentation.

Can you expand on the advantages of "non-object-oriented game libraries"? What other libraries do you consider too object-oriented?

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Thank you!

 

I don't thing either is advantageous, they are just different approaches. Each might be more suitable for given task. I think that non-OOP is slightly better for super-short-time-period game jams, such as 1 hour, two  hour or 0h game jam, since the code overhead is lower (you have to write less stuff to make things happen on screen). 

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